Extract out compression login to shared function

src/compress.ts

@@ -10,8 +10,8 @@ import * as logger from "./logger.js";
 interface CompressionOptions {
 	dir: string;
 	extensions: Array<string>;
-	enabled?: boolean;
-	batchSize?: number;
+	batchSize: number;
+	enabled: boolean | undefined;
 }
 
 async function* walkDir(dir: string, extensions: Array<string>): AsyncGenerator<string> {
@@ -30,16 +30,14 @@ const filterFile = (file: string, extensions: Array<string>): boolean => {
 	return extensions.some((ext) => extname(file) === ext);
 };
 
-// const compress = async <T>(name: string, compressor: () => T, opts: CompressionOptions): Promise<void> => {};
-
-export const gzip = async (
-	dir: string,
-	extensions: Array<string>,
-	enabled?: boolean,
-	batchSize = 10,
+const compress = async <T extends NodeJS.WritableStream>(
+	name: string,
+	compressedFileNames: string,
+	compressor: () => T,
+	{ dir, extensions, batchSize, enabled }: CompressionOptions,
 ): Promise<void> => {
 	if (!enabled) {
-		logger.warn("gzip compression disabled, skipping...");
+		logger.warn(`${name} compression disabled, skipping...`);
 		return;
 	}
 
@@ -54,46 +52,31 @@ export const gzip = async (
 		await Promise.all(
 			batch.map(async (path) => {
 				const source = createReadStream(path);
-				const destination = createWriteStream(`${path}.br`);
-				const brotli = createGzip({ level: 9 });
-				await stream.pipeline(source, brotli, destination);
+				const destination = createWriteStream(`${path}.${compressedFileNames}`);
+				const comp = compressor();
+				await stream.pipeline(source, comp, destination);
 			}),
 		);
 	}
 
 	const end = hrtime.bigint();
-	logger.success(`finished gzip of ${files.length} files in ${(end - start) / BigInt(1000000)}ms`);
+	logger.success(`finished ${name} of ${files.length} files in ${(end - start) / BigInt(1000000)}ms`);
 };
 
-export const brotli = async (
+export const gzip = async (
 	dir: string,
 	extensions: Array<string>,
 	enabled?: boolean,
 	batchSize = 10,
 ): Promise<void> => {
-	if (!enabled) {
-		logger.warn("brotli compression disabled, skipping...");
-		return;
-	}
-
-	const start = hrtime.bigint();
-	const files = [];
-	for await (const file of walkDir(dir, extensions)) {
-		files.push(file);
-	}
-
-	for (let i = 0; i < files.length; i += batchSize) {
-		const batch = files.slice(i, i + batchSize);
-		await Promise.all(
-			batch.map(async (path) => {
-				const source = createReadStream(path);
-				const destination = createWriteStream(`${path}.br`);
-				const brotli = createBrotliCompress();
-				await stream.pipeline(source, brotli, destination);
-			}),
-		);
-	}
+	await compress("gzip", "gz", createGzip.bind({ level: 9 }), { dir, extensions, enabled, batchSize });
+};
 
-	const end = hrtime.bigint();
-	logger.success(`finished brotli of ${files.length} files in ${(end - start) / BigInt(1000000)}ms`);
+export const brotli = async (
+	dir: string,
+	extensions: Array<string>,
+	enabled?: boolean,
+	batchSize = 10,
+): Promise<void> => {
+	await compress("brotli", "br", createBrotliCompress, { dir, extensions, enabled, batchSize });
 };